Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5301f2d3b3636b…

MALICIOUS

PDF

38.9 KB Created: 2020-08-22 07:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 429534c77d446d7474f3e1ac519e5639 SHA-1: 7c943ab3cd13724716f407146361a31f797d4419 SHA-256: 4b5301f2d3b3636ba421bb16c41283d1433133738c7d49fb006d5fb3e90b3a2a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though corrupted, contains the text 'calligraphy fonts for ms word' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary attack vector appears to be a link-based redirection to a malicious site, likely for further exploitation or phishing. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=calligraphy+fonts+for+ms+word
    • http://files.mentorsaltcave.com/uploads/1/3/1/3/131379689/gutep_zisit_sunimanulikagi.pdf
    • http://xepore.byboukje.nl/uploads/1/3/1/4/131406390/1427479.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/2954381069.pdf
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/dxf_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/2889/6161/files/ocean_eyes_sheet_music_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/favoligib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/91657389355.pdf
    • https://cdn.shopify.com/s/files/1/0432/9727/6064/files/dizeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/88163776730.pdf
    • https://cdn.shopify.com/s/files/1/0462/1887/0938/files/gexefokeweduvumabumixut.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/mujowexitutenezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9818/files/13201787325.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003fec.bin
89a61b9472a6a931d9d64ea32eae6e30916447a96f76adbca25623b74f0dc7de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FEC 5552 bytes
font_01_sfnt_off000052b2.bin
11657b94728886203f3aace1863d4f6babf30636f2c788271cd5d6f2e08cbf79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B2 1736 bytes
font_02_sfnt_off00005b53.bin
9e445dbbbd4c9047b6a9f1146bbbba1c496494874c0b8b15bfefb4eff45012e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B53 8592 bytes
font_03_sfnt_off000078e9.bin
d4c4feb8951055c2fa9bcdd55af7a36c85e906000362d0091f30ac23a55c13ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 16192 bytes

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